#include "config.h" // CONFIG_*
#include "disk.h" // struct chs_s
-struct segoff_s {
- union {
- struct {
- u16 offset;
- u16 seg;
- };
- u32 segoff;
- };
-};
-#define SEGOFF(s,o) ({struct segoff_s __so; __so.offset=(o); __so.seg=(s); __so;})
-
/****************************************************************
* Interupt vector table
#define GET_IVT(vector) \
GET_FARVAR(SEG_IVT, ((struct rmode_IVT *)0)->ivec[vector])
-#define SET_IVT(vector, seg, off) \
- SET_FARVAR(SEG_IVT, ((struct rmode_IVT *)0)->ivec[vector].segoff, ((seg) << 16) | (off))
+#define SET_IVT(vector, segoff) \
+ SET_FARVAR(SEG_IVT, ((struct rmode_IVT *)0)->ivec[vector], segoff)
/****************************************************************
u16 crtc_address;
u8 video_msr;
u8 video_pal;
- u16 jump_ip;
- u16 jump_cs;
+ struct segoff_s jump;
u8 other_6b;
u32 timer_counter;
// 40:70
// 40:90
u8 floppy_media_state[4];
u8 floppy_track[2];
- u8 kbd_mode;
+ u8 kbd_flag2;
u8 kbd_led;
- u32 ptr_user_wait_complete_flag;
+ struct segoff_s user_wait_complete_flag;
u32 user_wait_timeout;
// 40:A0
u8 rtc_wait_flag;
u8 other_a1[7];
- u16 video_savetable_ptr;
- u16 video_savetable_seg;
+ struct segoff_s video_savetable;
u8 other_ac[4];
// 40:B0
u8 other_b0[10];
// ElTorito Device Emulation data
struct cdemu_s {
- u8 active;
- u8 media;
- u8 emulated_drive;
- u8 controller_index;
- u16 device_spec;
+ struct drive_s *emulated_drive;
u32 ilba;
u16 buffer_segment;
u16 load_segment;
u16 sector_count;
+ u8 active;
+ u8 media;
+ u8 emulated_extdrive;
// Virtual device
struct chs_s lchs;
struct extended_bios_data_area_s {
u8 size;
u8 reserved1[0x21];
- u32 far_call_pointer;
+ struct segoff_s far_call_pointer;
u8 mouse_flag1;
u8 mouse_flag2;
u8 mouse_data[0x08];
// 0x121 - Begin custom storage.
u8 ps2ctr;
+ int RTCusers;
// El Torito Emulation data
struct cdemu_s cdemu;
- // Count of transferred sectors and bytes to/from disk
- u16 sector_count;
-
// Buffer for disk DPTE table
struct dpte_s dpte;
// Locks for removable devices
- u8 cdrom_locks[CONFIG_MAX_ATA_DEVICES];
+ u8 cdrom_locks[CONFIG_MAX_EXTDRIVE];
u16 boot_sequence;
#define EBDA_SIZE_START \
DIV_ROUND_UP(sizeof(struct extended_bios_data_area_s), 1024)
#define EBDA_SEGMENT_START \
- FLATPTR_TO_SEG((640 - EBDA_SIZE_START) * 1024)
-#define EBDA_SEGMENT_MINIMUM \
- FLATPTR_TO_SEG((640 - 256) * 1024)
+ FLATPTR_TO_SEG(BUILD_LOWRAM_END - EBDA_SIZE_START*1024)
// Accessor functions
-static inline u16 get_ebda_seg() {
+static inline u16 get_ebda_seg(void) {
return GET_BDA(ebda_seg);
}
static inline struct extended_bios_data_area_s *
-get_ebda_ptr()
+get_ebda_ptr(void)
{
- ASSERT32();
+ ASSERT32FLAT();
return MAKE_FLATPTR(get_ebda_seg(), 0);
}
#define GET_EBDA2(eseg, var) \
* Global variables
****************************************************************/
+#if MODE16 == 0 && MODESEGMENT == 1
+// In 32bit segmented mode %cs may not be readable and the code may be
+// relocated. The entry code sets up %gs with a readable segment and
+// the code offset can be determined by get_global_offset().
+#define GLOBAL_SEGREG GS
+static inline u32 __attribute_const get_global_offset(void) {
+ u32 ret;
+ asm(" calll 1f\n"
+ "1:popl %0\n"
+ " subl $1b, %0"
+ : "=r"(ret));
+ return ret;
+}
+#else
#define GLOBAL_SEGREG CS
-static inline u16 get_global_seg() {
+static inline u32 __attribute_const get_global_offset(void) {
+ return 0;
+}
+#endif
+static inline u16 get_global_seg(void) {
return GET_SEG(GLOBAL_SEGREG);
}
-#define GET_GLOBAL(var) \
- GET_VAR(GLOBAL_SEGREG, (var))
-#define SET_GLOBAL(var, val) do { \
- ASSERT32(); \
- (var) = (val); \
+#define GET_GLOBAL(var) \
+ GET_VAR(GLOBAL_SEGREG, *(typeof(&(var)))((void*)&(var) \
+ + get_global_offset()))
+#define SET_GLOBAL(var, val) do { \
+ ASSERT32FLAT(); \
+ (var) = (val); \
} while (0)
+#if MODESEGMENT
+#define ADJUST_GLOBAL_PTR(var) (var)
+#else
+#define ADJUST_GLOBAL_PTR(var) ((typeof(var))((void*)var - BUILD_BIOS_ADDR))
+#endif
/****************************************************************